EP1517580B1 - Transduction électroacoustique - Google Patents

Transduction électroacoustique Download PDF

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Publication number
EP1517580B1
EP1517580B1 EP04104232A EP04104232A EP1517580B1 EP 1517580 B1 EP1517580 B1 EP 1517580B1 EP 04104232 A EP04104232 A EP 04104232A EP 04104232 A EP04104232 A EP 04104232A EP 1517580 B1 EP1517580 B1 EP 1517580B1
Authority
EP
European Patent Office
Prior art keywords
array
signals
electroacoustical
signal
acoustic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP04104232A
Other languages
German (de)
English (en)
Other versions
EP1517580A3 (fr
EP1517580A2 (fr
Inventor
William Berardi
Hal P. Greenberger
Abhijit Kulkarni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bose Corp
Original Assignee
Bose Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bose Corp filed Critical Bose Corp
Publication of EP1517580A2 publication Critical patent/EP1517580A2/fr
Publication of EP1517580A3 publication Critical patent/EP1517580A3/fr
Application granted granted Critical
Publication of EP1517580B1 publication Critical patent/EP1517580B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/307—Frequency adjustment, e.g. tone control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/401—2D or 3D arrays of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
    • H04R2201/403—Linear arrays of transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/024—Positioning of loudspeaker enclosures for spatial sound reproduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S3/00—Systems employing more than two channels, e.g. quadraphonic
    • H04S3/008—Systems employing more than two channels, e.g. quadraphonic in which the audio signals are in digital form, i.e. employing more than two discrete digital channels

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)

Claims (9)

  1. Procédé d'une transduction électroacoustique, comprenant:
    - contrôler des signaux audio électriques, qui sont à délivrer à une paire de transducteurs électroacoustiques (302L, 302R) d'une matrice pour atteindre des caractéristiques de directivité et de volume acoustique en tant que fonction d'un contrôle de volume (508) ou du niveau de signal (1006) détecté, pour réduire la radiation des signaux acoustiques de sortie du transducteur électroacoustique de la matrice, où le contrôle des signaux résulte dans un changement du spectre de puissance acoustique rayonné de la matrice, quand les caractéristiques sont changées, et
    - ajuster l'égalisation (502) pour compenser pour le changement dans le spectre de puissance acoustique rayonné de la matrice.
  2. Procédé selon la revendication 1, où la compensation pour le changement dans le spectre de puissance acoustique comprend le maintien du spectre de puissance acoustique rayonné relatif essentiellement uniforme.
  3. Procédé selon la revendication 1, où le contrôle comprend la réduction de l'amplitude de l'un des signaux audio électriques pour des niveaux de volume acoustique plus élevés.
  4. Procédé selon la revendication 1, où le contrôle des signaux audio électriques comprend l'ajustement du niveau de l'un des signaux pour un intervalle de fréquence limité.
  5. Procédé selon la revendication 1, où le contrôle des signaux audio électriques comprend de traiter l'un des signaux dans un filtre passe-haut (612) et de traiter l'autre des signaux dans un filtre passe tout (614) complémentaire.
  6. Dispositif de transducteur électroacoustique, comprenant:
    - une connexion d'entrée pour recevoir un signal audio d'entrée électrique,
    - une multitude de transducteurs électroacoustiques (302L, 302R) dans une matrice, et
    - des circuits (504), construits et arrangés pour générer deux signaux audio électriques d'entrée (602, 606) en liaison à partir du signal audio d'entrée, lequel est couplé avec lesdits transducteurs électroacoustiques, et pour atteindre des caractéristiques prédéfinies de directivité et de volume acoustique en tant que fonction d'un contrôle de volume (508) ou du niveau de signal (1006) détecté, pour réduire la radiation des signaux acoustiques de sortie des transducteurs électroacoustiques de la matrice, et un égalisateur (502) qui est ajusté pour compenser le changement dans le spectre de puissance acoustique rayonné de la matrice.
  7. Dispositif selon la revendication 6, où l'égalisateur (502) comprend un égalisateur dynamique.
  8. Dispositif selon la revendication 7, où l'égalisateur dynamique comprend une paire de chemins de traitement de signaux (902, 904) et un combinateur (914) pour combiner des signaux qui sont traités sur les deux chemins.
  9. Matrice de transducteurs électroacoustiques, comprenant:
    - une source de signaux composants électriques en liaison,
    - une multitude de transducteurs électroacoustiques qui sont actionnés par lesdits signaux composants électriques en liaison, et
    - un dispositif de transducteur électroacoustique selon l'une des revendications 6 à 8, où la source des signaux composants électriques en liaison fournit le signal audio électrique d'entrée.
EP04104232A 2003-09-18 2004-09-02 Transduction électroacoustique Expired - Fee Related EP1517580B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/665,845 US7519188B2 (en) 2003-09-18 2003-09-18 Electroacoustical transducing
US665845 2003-09-18

Publications (3)

Publication Number Publication Date
EP1517580A2 EP1517580A2 (fr) 2005-03-23
EP1517580A3 EP1517580A3 (fr) 2006-06-07
EP1517580B1 true EP1517580B1 (fr) 2009-11-11

Family

ID=34194768

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04104232A Expired - Fee Related EP1517580B1 (fr) 2003-09-18 2004-09-02 Transduction électroacoustique

Country Status (6)

Country Link
US (1) US7519188B2 (fr)
EP (1) EP1517580B1 (fr)
JP (1) JP4642418B2 (fr)
CN (1) CN1599510B (fr)
DE (1) DE602004024016D1 (fr)
HK (1) HK1074323A1 (fr)

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Also Published As

Publication number Publication date
JP4642418B2 (ja) 2011-03-02
EP1517580A3 (fr) 2006-06-07
US7519188B2 (en) 2009-04-14
CN1599510A (zh) 2005-03-23
JP2005094777A (ja) 2005-04-07
HK1074323A1 (en) 2005-11-04
DE602004024016D1 (de) 2009-12-24
EP1517580A2 (fr) 2005-03-23
CN1599510B (zh) 2010-11-10
US20050063555A1 (en) 2005-03-24

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